Hi guys,

i have a situation here. it happens during track day only....
i'm running in Malaysia F1 circuit... when the car is cool....as in.. normal operation temperature... my car is boosting at 0.9 bar.. which is very fun to drive...
but right after 2 laps....

my boost got down to 0.5 BAR... very interesting... of course.. lost of power...

then red flag... and time to pit in.... and chilled for an hour or so... get my *** back to the track... the boost got back to 0.9 BAR... that's really interesting...

but when i try to smoke some cars on streets... running 220 km/h.... i did not see any boost drop at all...

do you all know what's the problem ? air intake too hot ?

another question... excessive lost of lubricant ... what was teh cause... realised it after track day.

 

i would have to say the IC gets to hot and you lose boost pressure that way. also get a water temp guage if you don't already have one b/c your engine can get meltdown hot before the stock gauge begins to move. try to get a bigger IC plus and radiator and a water temp. gauge. which will lead you to buy a fuel computer since in will run lean b/c of the IC. you might get away without having the fuel computer driving on the street but will most likly pop your motor if you try to go to a track event without a proper tune

 

I agree. Your intake air temps are probably climbing and the ECU is kicking down the boost for safety sake. Although my experience with this (on a dyno, so no moving air) was that the boost read normal but the power was down due to a different kind of ECU adjustment.

On the track, it's really crucial to be know your oil, intake air, and water temperatures.

Dave

 

yeah intake temps will affect the performance, even during cold vs hot days you can feel a slight difference in performance. and if your intake temps is too high it'll kick down to safe mode as dgeesaman mentioned.

 

yeah intake temps will affect the performance, even during cold vs hot days you can feel a slight difference in performance. and if your intake temps is too high the ecu will kick down to safe mode as dgeesaman mentioned.

 

Some FD's have an oil pan baffling problem - this results in sucking oil into the intake through the PCV system and burning it, IIRC.

There are quite a few threads that discuss this, if you search.

 

guys,

thanks for the information. i have a fuel computer.. but it's not adjustable. it's a remapped by Japanese. i'm running so called "pig rich".... air fuel 9.8.

i agreee that i need to get the water temp done. i'll put it as a next step.

as for air temp, there was a recomendation from another FD owner in my country on the track day... get a heat shield....because my radiator is stock mount... Apexi twin intakes are exactly after the fans of the radiator... perhaps they are really sucking in huge amount of hot air.

my car on trackday... the temperature feeling of my engine bay is not as hot as caught in a heavy traffic jam... that's amazing....

bigger IC...no budget yet.... cost quite alot... the intercooler mid sized one cost around my money 700, pipes cost 200, relocating of the radiator cost another feww hundred...
that's over budget....

probably i'll get an oil temp and water temp....monitor it first...
and also a heat shield for my air intake....

 

Hot air temps have nothing to do with losing 6 psi of boost. There is something failing when it gets really hot, that is the problem.

Please don't give out any more "advice", you don't know what you are talking about.

 

that's darn hard to diagnose.... only when running really hot....
even when i run normally or hard core driving on the street.. i never see the problem...
constantly boosting on the street... never see the problem.

even i bring it to my mechanic.... they can't tell... because it happen also boosting with primary turbo only....when track...

maybeeeeeeeeeeee my internal waste gate opening too big.... or really running on safe mode on my ECU.....god help me.... solve my problems......

i have another problem pending.... still not fix yet....

 

chun beng, as mentioned above there is a direct corelation to increased water temps and loss of power as the ecu retards to save your engine from going kablooooi!!

 

darn dev.. how u know it's me
oh yeah.. my number plate....
yeah.. next thing is to fit in a water and oil temp sensor...

u know where to get it ?

aiming for 2 digital meter.... easy to read...

 

oh yeah.... does anyone knows if it's possible to tab on the built in temp sensor instead of installing a new temp sensor ?

 

does anyone personally have the problem before ?